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dc.contributor.advisorAgrawal, Brij N.
dc.contributor.authorWatkins, R. Joseph
dc.dateDecember 2004
dc.date.accessioned2015-06-24T17:21:23Z
dc.date.available2015-06-24T17:21:23Z
dc.date.issued2004-12
dc.identifier.urihttp://hdl.handle.net/10945/45447
dc.descriptionApproved for public release; distribution unlimited.en_US
dc.description.abstractAcquisition, Tracking and Pointing (ATP) of space and airborne optical beams is becoming an important research topic as the requirements for the control of the beam is increasing. Arc-second accuracy and nano-radian jitter coupled with stringent pointing requirements test the limits of control systems. A unique Laser Jitter Control Testbed was built in order to study means to correct disturbances in a laser relay system. A new technique, the Adaptive Bias Filter (ABF), applies a compensating bias to the reference signal for the adaptive filter, allowing rapid convergence in correcting narrowband disturbances. A second technique, the Adaptive Delay Filter (ADF), was applied in a new way to the adaptive control systems to better correlate the error signal with the reference signal. Experiments using these techniques effectively demonstrated the usefulness of the new control methods, including the use of a combination Linear Quadratic Regulator (LQR) and LMS/ABF filter to remove disturbances caused by colored noise injected into an optical beam. The combination controller results in a 38 dB decrease in jitter caused by a 50 Hz vibration and a 10 dB decrease in an 87 Hz vibration of the supporting platform, and an overall 75% improvement in the broadband jitter experienced by the optical beam.en_US
dc.description.urihttp://archive.org/details/thedaptivecontro1094545447
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.titleThe adaptive control of optical beam jitteren_US
dc.typeThesisen_US
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentMechanical Engineeringen_US
dc.subject.authorAdaptive Controlen_US
dc.subject.authorOptical Beamen_US
dc.subject.authorJitteren_US
dc.subject.authorLeast Mean Squaresen_US
dc.subject.authorGradient Adaptive Latticeen_US
dc.description.serviceCommander, United States Navyen_US
etd.thesisdegree.nameDoctor of Philosophy in Mechanical Engineeringen_US
etd.thesisdegree.levelDoctoralen_US
etd.thesisdegree.disciplineMechanical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US


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